Attachment for sand caps or oil savers



Feb. 2,1926. 1,571,740

G. A. SEGUlNE ATTACHMENT FOR SAND CAPS OR OIL SAVERS Filed Feb. '7, 19 2 Sheets-Sheet 1 Feb. 2 ,19'26. 1,511,140

G. A. SEGUINE ATTACHMENT FOR SAND CAPS OR OIL SAVERS Filed Feb. '7. 1924 2 Sheets-Sheet 2 Patented Feb. 2, 1925.

UNITED STATES PATENT OFFICE.

GUY A. SEGUINE, OF FREDONIA, KANSAS, ASSIGNOR OF ONE-SIXTEENTI-I T0 FREDERICK A. 0ST, OF FREDONIA, KANSAS.

ATTACHMENT FOR SAND CAPS OR OIL SAVERS.

Application filed February To all whom it may concern:

Be it known that GUY A. SEGUINE, a citizen of the United States of America, residing at Fredonia, in the county of Vilson and State of Kansas, has invented new and useful Improvements in Attachments for Sand Caps or Oil Savers, of which the following is a specification.

While an oil well is still flowing, that is, after it has been brought in, it is frequently essential or desirable to use drilling tools to either deepen the well or clean it out. Obviously, during this operation it is desirable to save the oil coming from the casing, accomplishing such result by permitting the oil to flow through the pipe lines attached to holes in various types of easing heads, which holes are in the sides of the casing heads. As a rule, some means must be employed to prevent the oil from flowing from the hole or opening (through which the tool line passes) in the top of the casing head and yet at the same time permit the line to move freely during the drilling action of the tool. Generally, a sand cap (which is the oldest form of device now in use) is employed for accomplishing this purpose. The tool line is passed through the opening in the sand cap prior to attaching the drilling tool or bailer and then the cap is applied. Such caps are beveled on their edges, that is, where they seat on the casing head and are held in position by means of set-screws passing through the wall of the casing head close to the top.

In using this type of means for preventing the loss of oil from the well, it is essential to closely observe and stop the line just before the tool reaches the extreme top of the hole for the purpose of preventing the tool striking the sand cap and straining the line. lVhile the line is stopped, the tool being substantially immediately below the sand cap, the set-screws are removed, in which case the line with thetool on its lower end is free to move further and thereby carry the sand cap and the tool to the top of the derrick.

In order to save the time required for stopping the line and removing the setscrews, it is the purpose of the present in vention to provide, in an attachment for a sand cap or oil ,saver, a construction for automatically permitting the sand cap or '7, 1924. Serial No. 691,233.

oil saver to be released when the tool comes in contact with the top Another purpose is to provide means carried by the sand cap and with which the tool, when it reaches the topof the casing, operatively engages, elevating said means and causing it to cooperate with the setscrews so that, upon further movement of the tool line, the cap moves with the tool to the top of the derrick.

Still another purpose is the provision of packing means around members of the de vice actuated by the tool to guard against the escape of oil at such points.

It is to be understood that the particulars herein given are in no way limitative and that, while still keeping within the scope of the invention, any desired modifications of detail and desired proportions may be made in the apparatus according to the circumstances.

The invention comprises further features and combinations of parts to be hereinafter set forth, shown in the drawings and claimed.

In the drawings:

Figure 1 is a vertical sectional view through the upper part of an oil well casing, showing the casing head and illustrating the sand cap as applied, with means to cause an automatic detachment of the cap.

Figure 2 is a similar view showing the tool line as having been raised, with the tool in engagement with the cap releasing means, the latter having been raised sufiiciently to withdraw from under the set-screws whereby the sand cap may automatically detach from the casing head.

Figure 3 is a sectional view showing another position of the bolts 6.

Figure 4 is a plan View of the attachment for sand caps or oil savers.

Figure5 is a plan view of the oil cap removed.

Figure 6 is a plan view of the ring 7.

Figure 7 is a detail perspective view of the lug which detaches froni between the set-screws and the sand cap.

Referring to the drawings, 1 designates the sand cap which may be of a conventional construction, preferably beveled at its edge, as shown at 2, and provided with a tubular extension 3 which, in the present instance, extends upwardly. The bevel 2 also engages with the casing head and by means of suitable set-screws a (which pass through the wall of the casing head close to the top thereof), the sand cap is held in position.

At diametrically opposite points, the sand cap is provided with openings 5 which receive rods or bolts 6 which are adapted for longitudinal movement through the openings. A ring 7 is carried by the upper ends of the bolts which are threaded through the ring, there being a suitable set-screw 8 passing radially through the ring and engaging with the tubular extension 3 to hold the ring in position and prevent accidental displacement. A second ring 9 similar to the ring 7 is positioned below the sand cap and has openings 10 in which the lower ends of the rods or bolts 6 are threaded. Mounted upon the upper end portions of the rods or bolts are supports 16 through which the rods or bolts pass and carried by the supports are lugs 17 which are V-shaped, not only longitudinally but cross sectionally for engagement with the diametrically opposite V- shaped notches 20 formed in the beveled edge of the sand cap. tached to the supports by means of the extensions 18 and nuts 19. The supports are ring 7. In fact, nuts 21 are interposed between the supports and the ring, the nuts being threaded upon the rods or bolts 6 for the purpose of adjusting the supports in different positions on the bolts. The bolts pass through packing glands 11 carried by the sand cap.

The ring 9 depends below the sand cap and is mounted within the casing head 12 and its opening 13 is of diameter ofthe tool 1 L at the lower end of the tool line 15. The bolts or rods 6 have nuts G which clamp against the supports 16 and hold them in engagement with the nuts 21 between the ring 7 and the supports. However, the rods or bolts 6 can be adjusted through the supports and through the ring 7 and when the'rods or bolts 6- are in the positions shown in Figure 3, the nuts 6 can be adjusted down upon the supports and thereby hold them in the positions shown in said figure. In practice, it is necessary to use some suitable packing, such as flax or the like, in the glands 11 through which the rods or bolts 6 pass, thereby guarding against the escape of oil at this point during; the operation of removing the drilling tool. The rods or bolts 6 have running engagement through the sand cap, hence the necessity of the packingglands.

When the drilling tool is moved upward through the hole and finally reaches the top thereof, the top of the tool comes in contact with the lower ring 9 forcing the rods or bolts 6' upward and as the nuts 21 are below The lugs 17 are at-- engaged with the rods or bolts 6 above the a diameter less than the the supports 16, the supports rise and due to this action their lugs 17 likewise move.-

The lugs, as shown in the drawings, are V- shaped longitudinally as well as cross sectionally and lie between the set-screws at and the sand cap, the cross sectional V-shape ot the lugs engaging with the notches 20 of the sand cap. When theri-ng 9 reaches a position to cause the lugs to operate, the lugs will pull out from between the ends of the set-screws and the beveled edge of the sand cap, and will allow clearance sufficient to permit the sand cap to clear the set-screws and allow the sand cap to move with the tool line until the cap and thetool reach the top of the derrick, the cap resting upon the ring 9 which, in turn, rests upon the tool. This operation is automatic and eliminates the delay necessary in removing the sand cap by hand.

The invention having been set forth, what is claimed is: Y

1. The combination with an oil well casing head, of a cap seated thereon, radial screws carried by the head, lugs e-ngag-eablc between said screws and the periphery of the cap, and a carrier movable with respect to the cap and provided with a tool impacting element, the lugs being supported by the carrier and movable in a direction parallel with the axis of the cap for withdrawal between the cap and the screws upon movement of the carrier.

2. The combination with an oil well casing head, ot a sand cap seated thereon, said sand cap being peripherally beveled. radial screws carried by the head, V-shaped lugs engagcable between said screws and the pcri-phery ot the cap, and a carrier for the lugs movably mounted with respect to the cap and provided with a tool impacting elo- 1nent disposed below the sand cap, the carrier being provided with adjustable means to permit a limited movement of the same relative to the lugs.

S. The combination with an oil well casing head, of a sand cap seated thereon, said sand cap being peripherally beveled, radial are connected, the lugs having supportsthrough which the rods pass and the latter beingprovided with nuts disposed above and below said supports.

In testimony whereof he afii-Xes his signature.

our A. enemas. 

